2000 cadillac catera when i start her she shakes badly and has to warm an shes idling to high

Question

could it be a sensor that's connected to my engine or needing gaskets

Answer 1

Have the engine faults checked then noted. Then drive the vehicle when the check lite comes back on, to confirm the engine fault. Lots of codes which can be stored could be old, but these should be noted. This will help trying to trace the source of the problem which you are having, or maybe not. But is the first direction to be taken, and not quessing what is wrong, and replacing alote of parts which are not needed and not correcting your problem, will save you time and monies.

Answer 2

May be idler going bad in timing section!

Check the links below for more info on problems with this model.

Good luck!

Answer 3

dont say that  

Answer 4

If your CHECK ENGINE light is on you can take it to schucks and they will scan for trouble codes for free

If it has overheated it could be head gaskets